diff --git a/example/pubspec.lock b/example/pubspec.lock
index 3e3ab69..299279a 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -165,13 +165,6 @@ packages:
       relative: true
     source: path
     version: "0.1.3"
-  pretty_json:
-    dependency: transitive
-    description:
-      name: pretty_json
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.1.0"
   sky_engine:
     dependency: transitive
     description: flutter
diff --git a/lib/external_lib/pretty_json.dart b/lib/external_lib/pretty_json.dart
new file mode 100644
index 0000000..9831967
--- /dev/null
+++ b/lib/external_lib/pretty_json.dart
@@ -0,0 +1,7 @@
+import 'dart:convert';
+
+String prettyJson(dynamic json, {int indent = 2}) {
+  var spaces = ' ' * indent;
+  var encoder = JsonEncoder.withIndent(spaces);
+  return encoder.convert(json);
+}
\ No newline at end of file
diff --git a/lib/src/view/dio_response_view.dart b/lib/src/view/dio_response_view.dart
index 7bedae1..543e8c1 100644
--- a/lib/src/view/dio_response_view.dart
+++ b/lib/src/view/dio_response_view.dart
@@ -5,11 +5,11 @@ import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_highlight/flutter_highlight.dart';
 import 'package:flutter_highlight/themes/atom-one-light.dart';
+import 'package:power_logger/external_lib/pretty_json.dart';
 import 'package:power_logger/src/parser/dio_parser/dio_parser.dart';
 import 'package:power_logger/src/view/box_view.dart';
 import 'package:power_logger/src/view/table_view.dart';
 import 'package:power_logger/src/view/title_view.dart';
-import 'package:pretty_json/pretty_json.dart';
 
 // enum
 
diff --git a/lib/src/views/info_view.dart b/lib/src/views/info_view.dart
index 97af09a..bb388af 100644
--- a/lib/src/views/info_view.dart
+++ b/lib/src/views/info_view.dart
@@ -35,15 +35,14 @@ class _InfoViewState extends State<InfoView>
       elevation: 2,
       onPressed: () {},
       onLongPress: () {
-        Scaffold.of(context).hideCurrentSnackBar();
+        ScaffoldMessenger.of(context).hideCurrentSnackBar();
         Clipboard.setData(ClipboardData(text: subTitle));
-        Scaffold.of(context).showSnackBar(SnackBar(
+        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
           content: Text('已复制'),
           action: SnackBarAction(
             label: '确定',
-            onPressed: () {
-              Scaffold.of(context).hideCurrentSnackBar();
-            },
+            onPressed: () =>
+                ScaffoldMessenger.of(context).hideCurrentSnackBar(),
           ),
         ));
       },
@@ -76,15 +75,14 @@ class _InfoViewState extends State<InfoView>
         title: Text(title),
         subtitle: Text(subTitle ?? ''),
         onLongPress: () {
-          Scaffold.of(context).hideCurrentSnackBar();
+          ScaffoldMessenger.of(context).hideCurrentSnackBar();
           Clipboard.setData(ClipboardData(text: subTitle));
-          Scaffold.of(context).showSnackBar(SnackBar(
+          ScaffoldMessenger.of(context).showSnackBar(SnackBar(
             content: Text('已复制'),
             action: SnackBarAction(
               label: '确定',
-              onPressed: () {
-                Scaffold.of(context).hideCurrentSnackBar();
-              },
+              onPressed: () =>
+                  ScaffoldMessenger.of(context).hideCurrentSnackBar(),
             ),
           ));
         },
diff --git a/pubspec.lock b/pubspec.lock
index bb6cc5c..249c799 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -144,13 +144,6 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.0"
-  pretty_json:
-    dependency: "direct main"
-    description:
-      name: pretty_json
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "1.1.0"
   sky_engine:
     dependency: transitive
     description: flutter
diff --git a/pubspec.yaml b/pubspec.yaml
index 742be08..3ad6247 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,7 +11,6 @@ dependencies:
   flutter:
     sdk: flutter
   dio: ^4.0.0-prev3
-  pretty_json: ^1.1.0
   flutter_highlight: ^0.7.0
   device_info: ^2.0.0
   package_info: ^2.0.0